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(4.) (x+y) (x+y) (x+y).

Ans. 23 + 3x2y + 3xy?+y3. (5.) (ab) (a67 (ab).

Ans. a}- 3a2b+ 3ab?_73.

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(14.) (x++xy+xy2 +xys +y4) (xy).

Ans. 205-45

(15.) (ab) (a+b) (ab) (a+b).

Ans. af-2a62 +64.

(16.) (a? +b) (a-b).

Ans. a- a b + ab2-63.

(17.) (a?- 2ab +6%) (a-b).

Ans. q:-3ab + 3ab2-53.

(18.) (a +2b-3c) (a-2b + 3c).

Ans.a'--41+ 12bc-9c.

(19.) (25+4 +3+? +2+1) (x-1).

Aus. 26–1.

(20.) (1+x*-32° +2x) (2+2x+23).

Ans. 2+4.c4 +62-2° +25-523 +7.

Division. 1.

2. g++c)-(7-1 x2 + x +1)x3–1 (2–1 204 + 203 + x2

23 + x2 + x

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6.

-9ab + 662

9ab +662
23 – xPb +cx) xöyæ+by + cxoy (22y

wby +by+cx®y
2a +36 623 +8a2 +9ab + 12b (3n+4
6a3

+9ab

7.

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11. x+2y— 32) 22—4y2 +12yz—922 (2-2y+3z

22 + 2xy— 3xz

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13.

a-1) 46-1 (25+at+as+a+a+1
26 - a5

a3-1
25-1 ai -a?
a5 - 24

a?-1 24-1

al-
a4. -a3

a-1
-1

a

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